The big August movement occurs occasionally as early as the first days of the month, whereas it was delayed till the last week in 1947. About the first of August, 1943, according to Fred Schweder, Jr., a thousand Caribou swam across the mouth of Windy River in the course of an hour, and there were other thousands during a two weeks’ period. But such a large migration strikes this point only once in several years. In other years it may pass southward farther to the west, as in the vicinity of Simons’ Lake. In the fall of 1946--the very season when the Caribou bypassed the Eskimo camps on the upper Kazan River--there were said to have been far more than the normal numbers in the Windy River area. Thousands passed in one day, about October 10. The hills about Four-hill Creek then gave Fred Schweder, Jr., the impression of “moving with Deer.” By comparison, the numbers along the Windy River in 1947 were considered by the local residents to have been below normal, however impressive they may have been to a zoological visitor. On the other hand, it seemed to Charles Schweder, during his trip down the Thlewiaza River in late August of 1947, that Caribou were still very numerous; and he reported that people along the west coast of Hudson Bay were then getting more of the animals than in previous years. Only rarely do limited numbers of Caribou remain all winter in the Windy River area. During Charles Schweder’s years of residence there (about 1936-47) the animals had done so just once--on the Windy Hills. In 1946-47 Fred Schweder, Jr., found about 300 of them remaining all winter about the north end of Ennadai Lake. He said that the locally wintering animals are all bucks. Katello, an elderly Eskimo of the upper Kazan River, informed Charles Schweder that the Caribou used to remain there all winter, but now very rarely do so.